In this paper,we report a novel measurement system based on the development of Fudan Scanning Proton Microscopy(SPM) facility.By using Si-PIN diode(Hamamatsu S1223-01) detector,scanning transmission ion microscopy(STI...In this paper,we report a novel measurement system based on the development of Fudan Scanning Proton Microscopy(SPM) facility.By using Si-PIN diode(Hamamatsu S1223-01) detector,scanning transmission ion microscopy(STIM) measurement system has been set up.It can provide density and structural images with high probing efficiency and non-destruction by utilizing the energy loss of high energy(MeV) and focused ions penetrating through a thin sample.STIM measurement is able to map the density distribution of organic elements which mostly compose biology materials,such information can not be detected by using conventional Be-windowed Si(Li) X-ray detector in Particle Induced X-ray Emission(PIXE) technique.The spatial resolution capability of STIM is higher than PIXE technique at same accelerator status.As a result of STIM measurement,Paramecium attached on the top of Kapton tube was measured by STIM.展开更多
External micro-PIXE measurements were done to investigate the accumulation of Nd^(3+)on green algae species euglena gracilis.According to the Nd distribution patterns in the gracilis cells,the biosorption of Nd^(3+)to...External micro-PIXE measurements were done to investigate the accumulation of Nd^(3+)on green algae species euglena gracilis.According to the Nd distribution patterns in the gracilis cells,the biosorption of Nd^(3+)to the cell's compartments can be observed.Comparing elemental mappings of the cell treated with different doses of the 1 mg/mL Nd^(3+)solution,the Nd uptake of euglena gracilis cells do no relate with the doses.From distributions of Ca and Mg,it is found that the Ca is complementary to Nd partly,and the Nd and Mg distributions are alike to each other,showing that Nd may be mainly in the chlorophyll molecules.The biochemistry related is discussed.展开更多
基金Supported by Shanghai Synchrotron Radiation Facility project
文摘In this paper,we report a novel measurement system based on the development of Fudan Scanning Proton Microscopy(SPM) facility.By using Si-PIN diode(Hamamatsu S1223-01) detector,scanning transmission ion microscopy(STIM) measurement system has been set up.It can provide density and structural images with high probing efficiency and non-destruction by utilizing the energy loss of high energy(MeV) and focused ions penetrating through a thin sample.STIM measurement is able to map the density distribution of organic elements which mostly compose biology materials,such information can not be detected by using conventional Be-windowed Si(Li) X-ray detector in Particle Induced X-ray Emission(PIXE) technique.The spatial resolution capability of STIM is higher than PIXE technique at same accelerator status.As a result of STIM measurement,Paramecium attached on the top of Kapton tube was measured by STIM.
基金Supported by the National Natural Science Foundation of China(Nos.10675033 and 10975034)
文摘External micro-PIXE measurements were done to investigate the accumulation of Nd^(3+)on green algae species euglena gracilis.According to the Nd distribution patterns in the gracilis cells,the biosorption of Nd^(3+)to the cell's compartments can be observed.Comparing elemental mappings of the cell treated with different doses of the 1 mg/mL Nd^(3+)solution,the Nd uptake of euglena gracilis cells do no relate with the doses.From distributions of Ca and Mg,it is found that the Ca is complementary to Nd partly,and the Nd and Mg distributions are alike to each other,showing that Nd may be mainly in the chlorophyll molecules.The biochemistry related is discussed.
